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Spraff · Answer 1 · 2021-02-09T07:39:43+0000

Answer:

-12r2-9r-6

Explanation:

-distribute the subtraction symbol to the second group of numbers

-(9r2+7r+2) = (-9r2-7r-2)

-then combine each term together (-3r2-2r-4)+(-9r2-7r-2)

= -12r2-9r-6

HOPE THIS HELPS!!